I bought an Essex engine off eBay, it was an ex-MoD radar station emergency generator, I'd read that as ethanol was only 3/4 the energy density of petrol you had to compress it more to get the same power out of it. I thought that as mileage and power weren't the same things you'd probably get good mileage when you compressed ethanol enough to get comparable power. The Essex was designed to be dual fuel with different pistons, heads and fuel system. So I had the piston replaced by one listed for a Ford 200 along with six of the eight con-rods listed for a 351 Windsor the Gudgeon(wrist)pins sharing a size. I did have to have the Essex Crankshaft ground down to 3'10 so the big end would fit. Ethanol engines are a pig to start from cold so although the engine would run in a heated workshop or lab on carburettor starting on a frosty morning outside isn't going to happen.
To make ethanol work pretty much anywhere in Europe or North America a multipoint injection system needs to be fitted.

When you increase the compression of any engine you make it more thermodynamically efficient, that makes it more powerful.

My engine in my se5a was also a generator engine running on LPG I only changed a few bits after contacting the company that made the generator set they assured me the only modification they make if hardened valve seats .it runs well and was like a new engine inside

were the inlet manifold and pistons okay? I thought the generator engines were generally low compression with the single choke carb?

That may have been the case it did have a single choke carb but my rebore and fitting of the +90 thou Ford 200 CID pistons and the longer con-rods changed the CR to 16.51: 1. The inlet manifold was designed for a single choke carb but I got a Weber-pattern manifold and carb off eBay.

When you increase the compression of any engine you make it more thermodynamically efficient, that makes it more powerful.

+60 with standard pistons is 95.25 so that's a big overbore - has this engine run ethanol? if you haven't measured the cam, how do you know the valves aren't going to hit the pistons when it's up to temp?

They where the biggest oversize Eege in California did, they could have been +80 thou +30 would have done. I've got sets of Essex pistons both +20 and +30 thou, I had thoughts of building an engine for E85.

When you increase the compression of any engine you make it more thermodynamically efficient, that makes it more powerful.